diff --git a/common/djangoapps/terrain/stubs/tests/test_youtube_stub.py b/common/djangoapps/terrain/stubs/tests/test_youtube_stub.py
index 0ad715420e..ce8da2cd69 100644
--- a/common/djangoapps/terrain/stubs/tests/test_youtube_stub.py
+++ b/common/djangoapps/terrain/stubs/tests/test_youtube_stub.py
@@ -22,7 +22,7 @@ class StubYouTubeServiceTest(unittest.TestCase):
 
     def test_unused_url(self):
         response = requests.get(self.url + 'unused_url')
-        self.assertEqual("Unused url", response.content)
+        self.assertEqual(b"Unused url", response.content)
 
     @unittest.skip('Failing intermittently due to inconsistent responses from YT. See TE-871')
     def test_video_url(self):
@@ -32,7 +32,7 @@ class StubYouTubeServiceTest(unittest.TestCase):
 
         # YouTube metadata for video `OEoXaMPEzfM` states that duration is 116.
         self.assertEqual(
-            'callback_func({"data": {"duration": 116, "message": "I\'m youtube.", "id": "OEoXaMPEzfM"}})',
+            b'callback_func({"data": {"duration": 116, "message": "I\'m youtube.", "id": "OEoXaMPEzfM"}})',
             response.content
         )
 
@@ -46,7 +46,7 @@ class StubYouTubeServiceTest(unittest.TestCase):
                 '<?xml version="1.0" encoding="utf-8" ?>',
                 '<transcript><text start="1.0" dur="1.0">',
                 'Equal transcripts</text></transcript>'
-            ]), response.content
+            ]).encode('utf-8'), response.content
         )
 
     def test_transcript_url_not_equal(self):
@@ -60,7 +60,7 @@ class StubYouTubeServiceTest(unittest.TestCase):
                 '<transcript><text start="1.1" dur="5.5">',
                 'Transcripts sample, different that on server',
                 '</text></transcript>'
-            ]), response.content
+            ]).encode('utf-8'), response.content
         )
 
     def test_transcript_not_found(self):
diff --git a/common/djangoapps/terrain/stubs/youtube.py b/common/djangoapps/terrain/stubs/youtube.py
index 9b3be70de5..73a8b6778a 100644
--- a/common/djangoapps/terrain/stubs/youtube.py
+++ b/common/djangoapps/terrain/stubs/youtube.py
@@ -65,7 +65,7 @@ class StubYouTubeHandler(StubHttpRequestHandler):
                     '<?xml version="1.0" encoding="utf-8" ?>',
                     '<transcript><text start="1.0" dur="1.0">',
                     'Equal transcripts</text></transcript>'
-                ])
+                ]).encode('utf-8')
 
                 self.send_response(
                     200, content=status_message, headers={'Content-type': 'application/xml'}
@@ -77,7 +77,7 @@ class StubYouTubeHandler(StubHttpRequestHandler):
                     '<transcript><text start="1.1" dur="5.5">',
                     'Transcripts sample, different that on server',
                     '</text></transcript>'
-                ])
+                ]).encode('utf-8')
 
                 self.send_response(
                     200, content=status_message, headers={'Content-type': 'application/xml'}
@@ -99,7 +99,7 @@ class StubYouTubeHandler(StubHttpRequestHandler):
             # Delay the response to simulate network latency
             time.sleep(self.server.config.get('time_to_response', self.DEFAULT_DELAY_SEC))
             if self.server.config.get('youtube_api_blocked'):
-                self.send_response(404, content='', headers={'Content-type': 'text/plain'})
+                self.send_response(404, content=b'', headers={'Content-type': 'text/plain'})
             else:
                 # Get the response to send from YouTube.
                 # We need to do this every time because Google sometimes sends different responses
@@ -110,7 +110,7 @@ class StubYouTubeHandler(StubHttpRequestHandler):
 
         else:
             self.send_response(
-                404, content="Unused url", headers={'Content-type': 'text/plain'}
+                404, content=b"Unused url", headers={'Content-type': 'text/plain'}
             )
 
     def _send_video_response(self, youtube_id, message):
@@ -134,7 +134,7 @@ class StubYouTubeHandler(StubHttpRequestHandler):
                 })
             )
         })
-        response = "{cb}({data})".format(cb=callback, data=json.dumps(data))
+        response = "{cb}({data})".format(cb=callback, data=json.dumps(data)).encode('utf-8')
 
         self.send_response(200, content=response, headers={'Content-type': 'text/html'})
         self.log_message("Youtube: sent response {}".format(message))
@@ -158,7 +158,7 @@ class StubYouTubeHandler(StubHttpRequestHandler):
                 "message": message,
             })
         })
-        response = "{cb}({data})".format(cb=callback, data=json.dumps(data))
+        response = "{cb}({data})".format(cb=callback, data=json.dumps(data)).encode('utf-8')
 
         self.send_response(200, content=response, headers={'Content-type': 'text/html'})
         self.log_message("Youtube: sent response {}".format(message))